EP1524071B1 - Telescopic cover - Google Patents

Telescopic cover Download PDF

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Publication number
EP1524071B1
EP1524071B1 EP04256286A EP04256286A EP1524071B1 EP 1524071 B1 EP1524071 B1 EP 1524071B1 EP 04256286 A EP04256286 A EP 04256286A EP 04256286 A EP04256286 A EP 04256286A EP 1524071 B1 EP1524071 B1 EP 1524071B1
Authority
EP
European Patent Office
Prior art keywords
cover
members
cover members
telescopic
cover member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP04256286A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1524071A1 (en
Inventor
Akira FANUC Manshonharimomi Funakoshi
Akihiko Fanuc Manshonharimomi Fujimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Publication of EP1524071A1 publication Critical patent/EP1524071A1/en
Application granted granted Critical
Publication of EP1524071B1 publication Critical patent/EP1524071B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/28—Means for securing sliding members in any desired position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/08—Protective coverings for parts of machine tools; Splash guards
    • B23Q11/0825—Relatively slidable coverings, e.g. telescopic

Definitions

  • the present invention relates to a telescopic cover for use in a machine tool or other industrial machinery.
  • a telescopic cover that covers a feed mechanism, such as a feed shaft and a guide face of a machine tool table, to protect it from cutting fluid, chips, etc. is provided with telescopic cover members adapted to expand and contract for protection of the feed mechanism.
  • the cover member however sometimes meanders when it is in motion, and a large impact is caused for example when it stops after a sudden motion.
  • telescopic cover members each formed at its distal end with a bellow seal in the form of a wiper.
  • a stopper plate for preventing detachment formed in a rear end of the cover member is in contact with the bellow seal. An impact produced when the cover member projects is thereby relieved (refer to JP 6-11946U).
  • a telescopic cover having cover members each provided at a distal end thereof with a wiper clip or the like for removing chips adhered to the telescopic cover (refer to JP2000-308944A and JP2000-308945A).
  • a telescopic cover having cover members whose distal ends are each provided with a wiper of a rubber elastic material for preventing intrusion of chips, dusts, oils, or the like for protection of a sliding portion of a machine tool.
  • each wiper is fixed with a hard resin adapted for contact with a sliding face of an adjacent cover member, thus decreasing the friction resistance (refer to JP 3050875Y).
  • Another cover assembly which includes a stationary cover, a movable cover, and a thin metallic elastic member extending from one cover face for contact with another cover face to seal a gap therebetween, whereby foreign matter adhered to the cover is removed (refer to JP 2-48207Y).
  • the telescopic cover is generally so designed that, with a movement of a movable section, a corresponding one or more cover members are moved so that a cover region of the telescopic cover is expanded or contracted as a whole.
  • a limit in an amount of motion of each cover member and thus when one of the cover members reaches the stroke limit, it collides with the adjacent cover member to produce an impact.
  • the first-mentioned JP 6-11946U has telescopic cover members each adapted, when projecting, to collide at its rear end with a bellow seal, whereby an impact is relieved.
  • telescopic covers with braking means provided between at least two adjacent cover members according to the preamble of attached claim 1, wherein the braking means are arranged to apply pressing force against the relative motion of the adjacent cover members only when the cover members approach the end of their relative motion, in order to relieve impact at the end of the relative motion of adjacent cover members.
  • EP-A-0875337 and US-A-3,603,373 disclose such telescopic covers, wherein brake wedges come into operation only near the end of the relative motion between adjacent cover members.
  • the present invention provides a telescopic cover capable of reducing impact of cover members in stopping their motions and also capable of reducing meandering in motion of the cover members.
  • a telescopic cover comprising: a plurality of cover members having different sizes and successively stacked in a telescopic manner for making relative motion respectively so as to be expandable and contractible as a whole; and braking means provided between at least two adjacent cover members in said plurality of cover members to apply pressing force against the relative motion of the adjacent cover members in a direction substantially perpendicular to the relative motion, to thereby brake the relative motion; characterised in that the braking means is arranged to apply said pressing force always against said relative motion of the adjacent cover members, thereby to brake any said relative motion occurring between said adjacent cover members.
  • the braking means may be mounted on one of the two adjacent cover members to apply the pressing force to the other adjacent cover member.
  • the telescopic cover may further comprise a pressing-force adjusting mechanism for adjusting the pressing force applied by the braking means.
  • the braking means may comprise an elastic member mounted on one of the two adjacent cover members and a pressing member urged by the elastic member to press against the other of the two adjacent cover members.
  • the braking means may comprise an elastic member having one end mounted on one of the two adjacent cover members and the other end to press against the other of the two adjacent cover members.
  • the pressing-force adjusting mechanism may be mounted on the one of the two adjacent cover members to be in contact with the elastic member.
  • the cover member in motion is pressed by the braking means so that the pressing force generates a friction force serving as a braking force.
  • the impact of cover members in stopping their motions is reduced.
  • the cover member is always pressed by the braking means, the orientation of the cover member is retained constant, and the meandering of the telescopic cover is suppressed when it expands or contracts.
  • FIG. 1 is a schematic view of a telescopic cover according to one embodiment of this invention.
  • the telescopic cover is constituted by n cover members including first to n'th cover members C 1 , ..., C n .
  • the first cover member C 1 is provided with a mounting portion 1 through which the telescopic cover is mounted to a stationary section or the like.
  • the second cover member C 2 is slidably fitted into the first cover member C 1 in a telescopic fashion.
  • the third cover member C 3 (not shown) is slidably fitted into the second cover member C 2 .
  • the (i+1)'th cover member C i+1 is slidably fitted into the i'th cover member C i in a telescopic fashion.
  • Braking mechanisms 2 are respectively provided at distal end portions of the i'th cover members C i (into and out of which are the (i+1)'th cover members C i+1 , where i varies from 1 to n-1).
  • the cover member is provided at an upper face and one side face thereof with the braking mechanisms 2.
  • FIG. 2 is a sectional view for explaining the braking mechanism 2.
  • the braking mechanism 2 is constituted by an orientation maintaining device 22 having a central blind hole in which is received an elastic member 21 (constituted by a spring, rubber, resin, or the like, and the one constituted by a spring is shown by way of example in FIG. 2), a slide member 23 adapted to project by being urged by the elastic member 21, and fasting members 24 such as bolts by which the braking mechanism 2 is fixed to the cover member.
  • an elastic member 21 constituted by a spring, rubber, resin, or the like, and the one constituted by a spring is shown by way of example in FIG. 2
  • fasting members 24 such as bolts by which the braking mechanism 2 is fixed to the cover member.
  • the braking mechanism 2 is mounted to the cover member C i in such a manner that the slide member 23 adapted to project by being urged by the elastic member 21 presses the (i+1)'th cover member C i+1 that is slidably received in the cover member C i (first cover member C 1 ).
  • the braking mechanisms 2 are mounted to the cover member C 1 so that slide members 23 press the cover member C 2 .
  • the cover member C 2 (C i+1 ) is adapted to move relative to the cover member C 1 (Ci).
  • the slide members 23 be made of brass, resin, or the like to prevent them from being worn.
  • the braking mechanism 2 may be provided on the upper face and one side face of the distal end of each cover member, as shown in FIG. 1.
  • the braking mechanism 2 may be provided on only the upper face, both or only one of the side faces, or the upper and both side faces.
  • the braking mechanism 2 provided on the side face applies a pressing force B1 that exerts in a direction perpendicular to the moving direction A of the cover member
  • the braking mechanism 2 provided on the upper face applies a pressing force B2 exerting in a direction perpendicular to the moving direction A of the cover member, generating a friction force.
  • the cover member Ci+1 that moves relative to the cover member C i in a telescopic fashion is pressed by the braking mechanisms 2 provided on the upper and side faces of the cover member C i .
  • a gap between the cover members C i and C i+1 is maintained constant, thereby suppressing a change in the orientation of the cover member C i+1 which is moving.
  • FIG. 3 is a view in which a gap between the cover members C 1 and C 2 is seen from front. More specifically, FIG. 3 is a view showing the gap 3 between the cover members C 1 and C 2 in a case where the braking mechanism 2 is provided on the upper face and both the side faces of the cover member C 1 . Gaps between the cover members C 1 and C 2 on both sides are maintained constant by means of the slide members 23 that project by being urged by the elastic members 21 of the braking mechanisms 2. In addition, a gap between the upper faces of the cover members C 1 and C 2 is also maintained constant by means of the slide member 23 provided on the upper face. As a result, the orientation of the moving cover member C 2 is kept unchanged.
  • FIG. 4 is a view for explaining a change in the orientation of the cover member.
  • an explanation will be given by taking the cover members C 1 and C 2 as example.
  • the cover member C 1 When no braking mechanism 2 is provided on the cover member C 1 , there occurs a parallel displacement of the cover member C 2 in the left and right direction, as shown by an arrow ⁇ in FIG. 4. Also, the cover member C 2 rotates as shown by an arrow ⁇ , causing a change in the orientation of the cover member C 2 .
  • the cover member C 2 is in contact with the slide members 23, whereby the gaps 3 on the both sides are maintained constant, without causing a parallel displacement in the left and right direction in FIG. 4. Also in the vertical direction, the cover member C 2 is always pressed by the slide member 23 of the braking mechanism 2 that is provided on the upper face of the cover member C 1 , and no parallel displacement is caused in the vertical direction.
  • the cover member C 2 Since the cover member C 2 is pressed by the slide members 23 of the braking mechanisms 2 in such a manner that the gaps between the cover members in the vertical and widthwise directions are maintained constant, the cover member C 2 is prevented from being rotated around the moving direction and a direction perpendicular thereto, thus suppressing a change in the orientation of the moving cover member C 2 .
  • FIG. 5 shows a second embodiment of the braking mechanism.
  • This braking mechanism 4 is constituted by an elastic member 41 (the one shown by way of example in FIG. 5 is formed by a plate spring, but other elastic member made of rubber or resin may be used), and a fastening member 42 such as a screw for fixing the elastic member 41 to the cover member.
  • the braking mechanism 4 is fixed to a distal end of the cover member C i of the telescopic cover (instead of the braking mechanism 2 of FIG. 1, the braking mechanism 4 is mounted).
  • the elastic member 41 is fixed at its one end portion to a distal end of the cover member C i by means of the fastening member 42.
  • the elastic member 41 has its another end portion that is flat and adapted to press a surface of the cover member C i+1 , which is movable relative to the cover member C i in a telescopic fashion.
  • the flat distal end of the elastic member 41 serves as the slide member 43.
  • the cover member C i+1 moves relative to the cover member C i , therefore, it is always pressed by the elastic member 41.
  • the cover member C i+1 is braked by a friction force due to the pressing force of the elastic member 41.
  • the cover member C i+1 is maintained in position by means of the elastic member 41 as viewed in the pressing direction of the elastic member 41, so that a change in the orientation of the cover member C i+1 is suppressed. That is, the braking mechanism 4 of the second embodiment achieves the functions similar to those of the braking mechanism 2 of the first embodiment.
  • FIG. 6 is a view for explaining a third embodiment of this invention.
  • the braking mechanisms 2, 4 of the first and second embodiments produce a constant pressing force for pressing the cover member, which is determined at the time of design. Therefore, even if an excess or deficiency is caused in an actual braking force, it is difficult to make an adjustment.
  • the braking mechanism 5 of the third embodiment is the one in which a pressing-force adjustment mechanism is added to the first embodiment.
  • the braking mechanism 5 is comprised of an elastic member 51 such as a spring, an orientation maintaining device 52, a slide member 53, fastening members 54 such as bolts, a bolt 55, and a nut 56.
  • the orientation maintaining device 52 is formed at its central part with a hole 57 in which the elastic member 51 and the slide member 53 are received.
  • the hole 57 has an upper end portion thereof formed with threads with which the bolt 55 is threadedly engaged.
  • the fastening members 54 By means of the fastening members 54, the braking mechanism 5 is fastened to a distal end of each cover member C i (cover member C 1 in FIG. 6) of the telescopic cover.
  • a fastening screw such as a bolt. If the cover member C i is thin in thickness, it is impossible to appropriately form a threaded portion in the cover member C i for threaded engagement with the fastening screw.
  • a reinforcing member 58 is fixed beforehand to the cover member C i using bolts, welding or the like, and the cover member C i and the reinforcing member 58 are tapped for threaded engagement with the threads of the fastening member 54, whereby the braking mechanism 5 is reliably mounted.
  • the bolt 55 is threadedly engaged with the threads of the upper end portion of the hole 57, thereby pressing the slide member 53 through the medium of the elastic member (spring) 51.
  • the slide member 53 presses a surface of the cover member C i+1 (cover member C 2 in FIG. 6) that moves relative to the cover member C i in a telescopic fashion.
  • the pressing force F for pressing the cover member C i+1 can be increased or decreased for adjustment by increasing or decreasing an amount of screwing the bolt 55.
  • the bolt 55 and the elastic member 51 constitute the pressing-force adjusting mechanism.
  • the nut 56 threadedly engaged with the bolt 55 serves to fix the bolt 55, thereby keeping the amount of screwing the bolt 55 unchanged, even if vibration or the like is applied after completion of the pressing force adjustment.
  • FIG. 7 is a view for explaining a forth embodiment of this invention. This embodiment is the one in which a pressing-force adjusting mechanism is added to the second embodiment.
  • a braking mechanism 6 of the fourth embodiment is substantially the same in constriction as the second embodiment, but differs in that a bolt 61 and a nut 62 are added as the pressing-force adjusting mechanism. In other respect, it is the same as that of the second embodiment.
  • the same elements as those of the second embodiment shown in FIG. 5 are denoted by the same numerals.
  • the elastic member 41 is fixed at its one end to the cover member C i of the telescopic cover by means of the fastening member 42.
  • a tap hole 63 is formed in that position of the cover member C i which corresponds to a position which the elastic member 41 passes through.
  • the bolt 61 threadedly engaged with the tap hole 63 has its distal end that is adapted for contact with the elastic member 41, and the nut 62 is threadedly engaged with the bolt 61.
  • the pressing force of the elastic member 41 for pressing the cover member C i+1 is determined by adjusting an amount of screwing the bolt 61 into the tap hole 63. Specifically, by adjusting the amount of screwing the bolt 61, the position of the distal end of the bolt 61 is adjusted, thereby adjusting an amount of deviation of the elastic member 41 toward the cover member C i+1 with the distal end of the bolt 61.
  • the bolt 61 is fixed by the nut 62 to avoid a change in the amount of screwing the bolt 61 due to vibration or the like. Since the other configuration is the same as the second embodiment, a further explanation will be omitted.
  • the braking mechanism 2 or 4 is fixed to the outer cover member C i , and the slide member is pressed by an elastic force of the elastic member against the inner cover member C i+1 disposed telescopically in the outer cover member C i , thereby braking the movement of the cover member C i+1 and maintaining the orientation thereof.
  • the braking mechanism 2 or 4 may be fixed to the inner telescopic cover member C i+1 and the outer cover member C i may be pressed by the slide member, thereby braking the relative movement between the cover members C i and C i+1 and maintaining the orientation thereof.
  • the present invention is also applicable to an angle telescopic cover whose central part (center line of the cover member that is in parallel to the line extending in the moving direction) is raised, a telescopic cover whose opposite ends are connected to other members, or a telescopic cover having a pantograph mechanism.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Braking Arrangements (AREA)
EP04256286A 2003-10-16 2004-10-12 Telescopic cover Active EP1524071B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2003356716 2003-10-16
JP2003356716 2003-10-16
JP2004218369A JP3944199B2 (ja) 2003-10-16 2004-07-27 テレスコピックカバー
JP2004218369 2004-07-27

Publications (2)

Publication Number Publication Date
EP1524071A1 EP1524071A1 (en) 2005-04-20
EP1524071B1 true EP1524071B1 (en) 2006-12-06

Family

ID=34380425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04256286A Active EP1524071B1 (en) 2003-10-16 2004-10-12 Telescopic cover

Country Status (5)

Country Link
US (1) US7314077B2 (ja)
EP (1) EP1524071B1 (ja)
JP (1) JP3944199B2 (ja)
CN (1) CN100566930C (ja)
DE (1) DE602004003539T2 (ja)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5224789B2 (ja) * 2007-11-19 2013-07-03 株式会社テクトワン 衝撃吸収チューブを設けたテレスコピックカバー
JP5401136B2 (ja) 2009-03-19 2014-01-29 リョービ株式会社 転写装置の速度制御方法及び速度制御装置
DE102010004250A1 (de) * 2010-01-08 2011-07-14 HEMA Maschinen- und Apparateschutz GmbH, 63500 Längenvariable Schutzabdeckung
ITBO20110162A1 (it) * 2011-03-29 2012-09-30 Pei Protezioni Elaborazioni Dispositivo di copertura e protezione per macchine o impianti
ITBO20110376A1 (it) * 2011-06-28 2012-12-29 P E I Protezioni Elaborazioniindus Triali S R L Dispositivo attuatore per protezioni telescopiche
CN102490079B (zh) * 2011-12-20 2013-09-04 天津市鼎鑫晟达精密机床制造有限公司 数控齿扇插齿机的柔性可调式挡油装置
JP5324682B1 (ja) * 2012-06-11 2013-10-23 ファナック株式会社 工作機械のテレスコピックカバー
CN102744645B (zh) * 2012-06-29 2014-06-25 上海三一精机有限公司 一种提高伸缩防护罩稳定性的结构及机床
JP5964189B2 (ja) * 2012-09-24 2016-08-03 オークマ株式会社 摺動面保護装置
JP5638112B1 (ja) * 2013-07-10 2014-12-10 ファナック株式会社 切粉が機械内部に侵入するのを防止するストッパを備えた工作機械
JP6405780B2 (ja) * 2014-08-08 2018-10-17 スター精密株式会社 工作機械
CN107030491A (zh) * 2017-06-09 2017-08-11 重庆帅能机床制造有限公司 一种机床加工中心滑动导轨卸荷装置
JP6542845B2 (ja) 2017-07-14 2019-07-10 ファナック株式会社 テレスコピックカバー及び工作機械
CN107932178A (zh) * 2017-11-17 2018-04-20 宁夏共享机床辅机有限公司 一种机床导轨防护罩的预紧装置
JP6581170B2 (ja) * 2017-12-13 2019-09-25 ファナック株式会社 工作機械
CN109296926B (zh) * 2018-11-30 2024-02-06 重庆海装风电工程技术有限公司 一种防夹装置
DE102019100437B4 (de) * 2019-01-09 2022-09-15 Olympus Winter & Ibe Gmbh Siebkorb und Deckel hierfür
CN112008480A (zh) * 2020-07-31 2020-12-01 锋冠精密机械(昆山)有限公司 一种伸缩防护连动运行结构
CN113245605B (zh) * 2021-05-13 2022-09-09 南京工程学院 一种具有可任意摆动铣头的五轴加工数控机床

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JP2000308944A (ja) 1999-04-27 2000-11-07 Nitta Ind Corp 工作機械用ワイパー
JP3466106B2 (ja) 1999-04-27 2003-11-10 ニッタ株式会社 工作機械用ワイパー
IT1309686B1 (it) * 1999-04-30 2002-01-30 Pei Protezioni Elaborazioni Dispositivo ammortizzatore per protezioni telescopiche
IT1310285B1 (it) * 1999-07-30 2002-02-11 Pei Protezioni Elaborazioni Dispositivo di movimentazione e ammortizzamento per protezioniteloscopiche.
JP2005066788A (ja) * 2003-08-26 2005-03-17 Fanuc Ltd 粉塵侵入防止装置、テレスコカバー、及び移動機構

Also Published As

Publication number Publication date
DE602004003539D1 (de) 2007-01-18
DE602004003539T2 (de) 2007-09-20
US7314077B2 (en) 2008-01-01
EP1524071A1 (en) 2005-04-20
JP3944199B2 (ja) 2007-07-11
CN100566930C (zh) 2009-12-09
US20050082118A1 (en) 2005-04-21
JP2005138274A (ja) 2005-06-02
CN1608796A (zh) 2005-04-27

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